Rotary pump.



T. A. BATEMAN.

ROTARY PUMP.

APPLICATION FILED FEB. 24. 191-5 6 1 7 I Patented Apr. 11, 1916.

2 SHEETS-SHEET I T.A.BATEMAN.

ROTARY PUMP.

APPLICATION FILED FEB. 24. 1915.

1 178,61 7. Patented Apr. 11, 1916, v

2 SHEETS-SHEET 2.

H v a 8 I y L W y If? I 5 g y i. 65 5 THOMAS A. BATEMAN, F PORTLAND, OREGON.

no'rAnY PUMP.

To aZZwhom it may concern:

, a citizen of the United States, residing at blades carried by the rotary piston,

Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Rotary Pumps, of which the following is a specification, reference being had to the accompanying drawings.

I This inventlon relates to rotary pumps, and has for'its primary object to provide improved -means for mounting the rotary piston within the pump cylinder whereby the same may be readily removed and a fluid tight connection effected between the ends of the piston and the cylinder heads. U

The invention has for another important object to provide a series of radially movable and concentrically located actuating members arranged upon the inner faces of the cylinder heads and cooperating with said rotor blades to maintain the outer ends of the same in contact with the cylinder wall during the rotation of the piston.

The invention has for a further general object to improve and simplify theconstruction of rotary pumps of the above character, whereby a pump of maximum capacity may be operated with a minimum expenditure power. 1 With the above and other objects in view,- my invention consists in the novel features of construction, combination, and arrangement of parts to be hereinafter more fully descrlbed, claimed, and illustrated in the accompanying drawings, in which,

Figure 1 is a longitudinal section of a rotary'pump constructed in accordance with the preferred embodiment of my invention; Fig. 2 is a section taken on the line 22 of Fig. 1; Fig. 3 is an enlarged inner face view of one of the cylinder heads showing the concentric ring mounted thereon; Fig. 4 is a detail perspective view of one of the rotor blades.

Referring in detail to the drawing, 5' designates the body of the pump cylinder which is provided with a suitable base indicated at 6 adapted to be bolted or otherwise secured upon a stationary support. The cylinder heads 7 are identical in construction and. are removably secured upon opposite ends of the body 5 by suitable bolts indicated at 8. Each of these cylinder heads is provided upon its outer face with a sleeve 9 Specification of Letters Patent.

Patented Apr. 11, 1916.

' Application filed February 24, 1915. Serial No. 10,246.

which is adapted to receive a suitable packing material. This sleeve is eccentrically located upon the cylinder head while upon the inner face of said head, a concentrically disposed cylindrical boss 10 is formed and is provided with a longitudinal bore 11 in concentric relation to the bore of the sleeve 9.

12 designates the power shaft which is rotatably mounted in the cylinder heads and upon said shaft, the rotary piston 13 is keyed or otherwise-fixed, This piston includes a central body portion which is connected to the outer rim 14 by means of a plurality of radially disposed arms 15. These arms are co-extensive in length with the rotor body and are longitudinally slotted as at 16 from the periphery of the rotor inwardly to their point of juncture with the body of the piston. It will be observed, from reference to Fig. 2, that by thus eccentrically mounting the power shaft cured thereon, within the cylinder, the periphery of the piston at the top thereof, frictionally engages the inner face of the cylinder wall, and gradually diverges from said wall upon each side of the vertical center of the cylinder so as to produce a gradually increasing space between the pis- Upon the concentric boss 10, on the inner i face of each of the cylinder heads, the hub extension 20 of a metal ring 19 is disposed. The face of the cylinder head is recessed at at 21, to receive this metal ring and said ringis provided upon its outer edge with a laterally disposed annular flange 22. The rings 19 are secured to the cylinder heads in any suitable manner and the flanges 20 thereon are engaged in the recesses 18 in the opposite ends of the rotor blades 17 The cylinder body 5 is provided upon one side with a lateral extension 23 having a plurality of intake ports 24 therein. Upon the top of the cylinder body, sion 25 is integrally formed, having the outlet ports 26 therein. By providing a pluand the piston which is sea similar extenrality of the intake ports 24, a series of pipes I extended in various directions to several points from which water is to be drawn.

Thebody wall of the cylinder 5 on the opposite side of the cylinder with respect to the intake ports 24;, is outwardly disposed and extended in eccentric relation to the center of the cylinder, as at 27, to provide a maximum space above the center of the cylinder and between the periphery of the piston and the cylinder wall for the movement of the water into the outlet ports 26.

From the above description, taken in con-- nection with the accompanying drawing, it 1s believed that the construction and manner of operation by my invention will be clearly understood. Assuming that the piston 13 is being rotated in the direction indicated by the arrow in Fig. 2, it will be seen that the rotor blades 17- are forced outwardly in the slots 16 by the flanges 22 of the rings 19 on the inner faces of the cylinder heads, so that the outer ends of said blades are maintained in sliding contact with the wall of the cylinder. As the blades successively pass theintake ports 24:, water is drawn into thecylinder 5 through said ports and the succeeding blade carries this water downwardly through the space between the piston and the cylinder wall and then upwardly upon the opposite side of the cylinder, said blade exerting considerable pressure on thewater so that it is expelled through the outlet ports 26. As the blades travel upwardly, they are gradually drawn inwardly into the slots 16 owing to the eccentric mounting of the rotary piston with respect to the rings 19, so that as said blades pass the outlet ports 26, they are entirely disposed within said slots and do not project beyond the periphery of the piston. The close contact'of the periphery of the piston with the wall of the cylinder at this point, precludes the possibility of back pressure of the water entering through the intake ports 24 in an upward direction over the piston into the outlet ports. By means of my invention, water may be pumped from a number of different points, and in maximum quantities with a pump of comparatively small size. It will, of course, be understood that the length of the rotary piston may be increased and a large number of the intake and outlet ports provided so that the capacity of the pump will be correspondingly increased. The several parts of the pump mechanism may be very easily and quickly assembled or disassembled, and as these parts are all of simple form, it will. be manifest that the invention can be produced at small manufacturing cost.

.VVhile I have shown and described the preferred construction and arrangement of the various elements, the same are, nevertheas may be fairly embodied within the spirit.

and scope of the invention as claimed.

Having thus fully described my invention, what I desire to claim and secure by Letters Patent is 1 1. A rotary pump including a piston cylinder having removable heads, said cylinder being provided with a series of intake and outlet ports, a power shaft eccentrically mounted in the cylinder heads, a rotary piston fixed upon said shaft within the cylinder and frictionally engaging the cylinder wall at its periphery at one side of the outlet ports and contiguous thereto, a series of radially movable blades carried by the piston and frictionally contacting with said heads, the inner faces of said heads being recessed, the end portions of the blades having re cesses therein, and a flanged ring mounted in. the recesses of each of the casing heads, the inner faces of said heads being recessed, the end portions of the blades having recesses therein, and a flanged ring mounted in the recesses of each of the casing heads, the flange thereof projecting inwardly and loosely fitting into the recesses in the corresponding ends of the blades to move the blades radially with respect to the piston in the rotation of the latter.

2. A 'rotary pump including a cylinder provided with removable heads, said cylinder having a series of intake and outlet ports, a power shaft eccentrically mounted in the cylinder heads, a rotary piston fixed upon said shaft within the cylinder, a series of radially movable blades carried by said piston and projecting beyond the opposite ends of the hub portion thereof, the projecting ends of'said blades being recessed, concentrically arranged rings mounted upon the inner faces of the cylinder heads and provided with inwardly projecting annular, flanges engaged in the recesses in the relatively opposite ends of said blades to move said blades radially with respect to the piston and'maintain the same at all times in engagement with the wall of the cylinder.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

THOMAS A. BATEMAN. 

